Wood-cutting machine



(No Model.)

B. DAMUS.

WOOD CUTTING MACHINE.

Patented Jun 21, 1892.

[77 an for UNITED STATES PATENT OFFICE.

BENNO DAMUS, OF CINCINNATI, OllIO.

WOOD-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 477,201, dated June 21,1892.

Application filed June 5, 1891. Serial No. 395,176. (No model.)

To alt whom it may concern.-

Be it known that I, BENNO DAMUS, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Im provements in IVood-Cu ttin gMachines; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto tho accompanyingdrawings, and to the figures of reference markedthereon, which form a part of this specification.

This invention relates to a machine to be used for the purpose ofreducing wood in the shape of logs or timber to board or veneer form.The reduction here in view is accomplished by cutting with a knife, andfor this reason is confined to boards of limited thickguide-roller,taken on line 4 4 of Fig. 1.

Sis an inclined track, upon which a carriage 9 travels with areciprocatory movement. It carries a number of suitable headblocks 10,with suitable clamping devices 12, which hold the timber in positionwhile being reduced. These head-blocks are provided with stationary nuts13, through which screw-shafts 14,provided with bevel-wheels 15,

' pass. Another shaft 16 runs lengthwise with as a support for the knife20, which is secured to two extensions 21, projecting out from that sideof the frame which faces the carriage and located in such a position asnot to be in the path of the traveling log. The knife is of a shape mostplainly shown in Fig. 4 and is secured to these projections in a mannerthat its cutting-edge stands out somewhat farther and closer to the logthan its rear edge, so that the former is the only part of the knifewhich touches the log, and by which arran gem ent the friction isavoided which would be caused if the log while passing would through itsentire length touch fully the flat surface of the knife-blade and rubcontinually against the entire width of the same. Somewhat in advance ofthe knife is located a roller 22, turning around shaft 28, j ournaled inbearings 24, which latter extend out from the top and bottom of the mainframe. The carriage may be propelled by any suitable motor and connectedto it in any suitable way. In the case under consideration a so-calledshotgun feed is used, which consists of a steamcylinder 25, containing apiston, the movements of which are controlled by a suitablesupply-valve, the piston-rod 26 being connected to a downward extension27 of the carriage. The thickness of the board or veneer to be cutdepends upon the position of roller 22 with reference to theknife-blade. The log is so placed that it will be in close contactagainst this roller, but clear and pass it as it advances. Thecutting-edge of the knife extends out somewhat farther from the framethan this roller and closer to the log, so as to be in the latters pathas it approaches, and cuts into and through the same as the logadvances. The difference of the distance of extension between roller andthe cutting-edge of the knife regulates the thickness of the board.The'log in passing on strikes the cutting-edge of the knife, its cut-offportion passing between the former and the frame. After the cut iscompleted the carriage is returned, the log reset by advancing itlaterally toward roller 22 by an operation of the head-blocks, afterwhich the carriage is started up again.

The journals of shaft 23 are eccentrically lo-' cated thereon, so thatby the operation of a lever 28, secured to the upper end of said shaft,roller 22 may be moved in or out from the frame, or, which is the same,moved farther or closer to the knife in a lateral direction, permittingthus an accurate adjustment of the out. A screw-threaded pin 29 issecured to this lever and extends into and through a slot 30, located ina segmental bracket 31, which latter is bolted to a frame 19. Ascrewwheel 32 engages with pin 29 and by being tightened secures andholds lever and roller in their adjusted positions.

In the practical operation of this machine the attendant may ride uponand with the carriage, or he may stand to one side of it. In this lattercase the hand-wheel for operating and setting the head-blocks anddesignated by 33 is placed upon a shaft 34, reaching across thecarriage, and transmits the motion to shaft 16 by means of a pair ofbevelwheels 35 36. As willbe seen, the log rises continually whilepassing the knife, thus producing a shearing out, which greatlyfacilitates the cutting operation. By inclining the knife and its frametoward the approaching carriage, as shown, the degree of the shearingcut is materially increased.

thickness of the boards, also prevents the cut from following the grainand causing the log to run off and into the knife, a possibility whichexists and which is favored by certain formations ofthe grain and whenthe same runs inclined or different to the line of the out.

It should be mentioned here that I find it preferable in most cases tosoften the log by steaming previous to commencing its reduction. Itsgradual advancement on its supports and toward the knife might be doneautomatically instead of being accomplished by hand, which substitutionhas, however, no direct bearing on my invention.- The adjustment of thethickness of the boards might be accomplished by having roller 22stationary and knife 20 adjustable, which would be a mere reversal ofthe functions of these parts as first described, without producing anynew presence of twowitnesses.

results.

In the drawings the bottom timbers of the carriage are provided withrunners 37, sliding in grooved rails 38. This might be reversed,

however, or wheels or rollers substituted for the runners.

Having described my invention, I claim as new- 1. In a wood-cuttingmachine, the general construction and combination of an inclined track,a stationary knife-frame with knife secured beside the track andinclined thereto,

'a carriage having inclined runners and a horizontal platform andprovided with means to hold the wood thereon, an extension 27, reachingdown from the under side of the carriage, and connecting means 26,connecting the carriage to the motive power through the medium of saidextension, all as substantially shown and described.

2. In a wood-cutting machine of the kind described, the means toregulate the thickness of, the cut and to prevent the same from,following the grain in a direction different from the intended line ofout, said means consisting of aroller 22, a shaft 23, on which theformer turns, eccentric bearings on which said shaft turns, an adj usting-lever, and means to hold it in its position, and whereby roller 22 maybeadjusted laterally with reference to the knife, all as shown anddescribed. Roller 22, in addition to regulating the j construction andcombination of an inclined 3. In a wood-cutting machine, the generaltrack, a stationary knife-frame secured beside the track in an inclinedposition and provided with extensions to which the knife is secured andwith bearings for roller-shaft 23 and with a segmental bracket 31, acarriage having a horizontal platform and inclined runners and suitablyprepared to securely hold the wood, an extension 27 on said I carriage,to which the motive power connects,

a roller 22, being laterally adjustable in its 5 position between thecarriage and the knifeframe, serving as a means to regulate thethickness of the cut and as a guide, a shaft 23, on which this rollerturns, eccentric-bearings on which this shaft turns, an adjustablelever, and means to hold it in its position on bracket 31, all assubstantially shown and described.

In testimony whereof I affix my signature in BENNO DAMUS. Witnesses:

BUCHANAN PERIN, CARL SPENGEL.

